ursprache (u̇ər shpräḵə)

Proto-Indo-European is the ursprache of the Indo-European family of languages. Diagram from www.german.about.com

Katharine Close spelled the word ursprache to win the 2006 National Spelling Bee. Ursprache means a parent language, especially one reconstructed from the evidence of later languages.  Ursprache comes from the German roots ur meaning original and sprache meaning language. ProtoIndo-European is the ursprache, or the parent language of Indo-European languages such as Latin, Greek, Hindi and a lot of other languages.